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Finding the Fourth Proportional to 42.50, 63.46 and 33.86

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Solution

The fourth proportional to 42.50, 63.46 and 33.86 is: 50.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.50 : 63.46 = 33.86 : x
  2. Step 2: Convert to fraction form
    42.50/63.46 = 33.86/x
  3. Step 3: Cross multiply
    42.50x = 63.46 × 33.86
  4. Step 4: Simplify right side
    42.50x = 2,148.76
  5. Step 5: Solve for x
    x = 2,148.76/42.50
  6. Step 6: Final answer
    x = 50.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.